The mechanic of having to chart the maze yourself by manually testing the walls is an interesting mechanic, and it is fun for some time, but it quickly overstays its welcome. In a game like this, I think it is often helpful to only make a few levels, and spend the rest of the time working on polish. Because it is a genuinely fun mechanic, just not for a super long time.
I also most curse your name for making me walk for like 10 minutes to get to Jupiter only to give me a dead end. Only a monster would do that!